My example of misuse is not to forswear the issue entirely, only to demonstrate that there do exist philosophical objections to keyword arguments. Trust me, I've long been an advocate of keyword/default arguments for Rust. :P The last time that anyone made a push for them was in the run-up to 1.0, when it was decided there were more pressing issues than keyword/default args (alongside a bevy of other features), and the decision to implement them was officially postponed. I might get around to submitting an RFC to revive them sometime this year, though I'm still unsure about some of the semantic details that we might want to consider.